fix(iis-migration): maljarka.tandemmebel.ru 502-on-HTTPS resolved

Root cause (NOT a migration defect): MoreThenCms tenant `maljarka`
had `dbo.Sites.SettingsData = NULL` (no `httpSecure` block) -> on a
real HTTPS request SnollaMiddleware throws KeyNotFoundException ->
502. HTTP served 200 fine. DNS/TLS/IIS binding all correct.

Fix applied to shared MSSQL (mssql.kzntsv.site): UPDATE Sites set
SettingsData with httpSecure{enableHttps:true,...} + recycle snolla
pool. Verified 443->200 server-local and external via 80.64.31.36;
kupimknigi untouched. Audit: maljarka was the only NULL-settings
site with a :443 binding (of 25); rimiz degraded for another reason.

- new concept: morethencms-null-settingsdata-https-502
- entities/ruvds-iis-host: maljarka moved from Degraded -> fixed
- index.md + log.md + STATUS.md + NEXT_SESSION.md updated

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.wiki/index.md

@@ -30,6 +30,7 @@ Catalog of all wiki pages. One line per page, organized by type. Updated on ever
 - [hyper-backup-structure-and-recovery](concepts/hyper-backup-structure-and-recovery.md) — Hyper Backup — структура репо и стратегия восстановления
 - [iis-migration-2026-05-19-postmortem](concepts/iis-migration-2026-05-19-postmortem.md) — post-mortem миграции CMS на нативный IIS, 2026-05-19
 - [minio-imgproxy-on-vds](concepts/minio-imgproxy-on-vds.md) — MinIO+imgproxy stack на VDS, миграция с upgrade 2020→2025 + DNS swap pending
+- [morethencms-null-settingsdata-https-502](concepts/morethencms-null-settingsdata-https-502.md) — MoreThenCms тенант с `Sites.SettingsData=NULL` → 502 только на HTTPS (нет `httpSecure` → KeyNotFound); fix = UPDATE + recycle. maljarka 2026-06-08
 - [mssql-container-data-restore](concepts/mssql-container-data-restore.md) — MSSQL контейнер с восстановленными production data — паттерн
 - [mssql-on-vds](concepts/mssql-on-vds.md) — MSSQL Express 2022 Linux на VDS — миграция + login orphan fix + traefik TCP gotchas
 - [ocis-on-vds-deploy-recipe](concepts/ocis-on-vds-deploy-recipe.md) — oCIS на VDS — deploy recipe + non-obvious gotchas (UID 1001 vs 1000, basic auth, LibreGraph user-create)